Quantity: 1 Pair Material: 925 Sterling Silver Small Stud ( Post Length 10mm / 3/8" ) Lightweight, easy to take in and out, yet stay securely in place. Comfy (comes with Sterling Silver Butterfly back , Clear Silicone Bullet Clutch Ear Nuts for Earring Safety Backs and Little stored box ) Part Size : 8mm x 8 mm(conversion : 1 inch = 25.4mm or 1mm = 0.0393 inch) Small Stud ( Post Length 10mm / 3/8" ) Lightweight, easy to take in and out, yet stay securely in place. Comfy (comes with Sterling Silver Butterfly back , Clear Silicone Bullet Clutch Ear Nuts for Earring Safety Backs and Little stored box )